Statutes governing New Yorks age of consent, associated criminal charges, available defenses, and penalties for conviction. In New York, it is illegal for an adult (someone 18 or older) to have sex with a minor (someone younger than 17), even if the sex is consensual.

Can a 17 year old date a 20 year old legally in New York?

Yes, the age of consent in NY is 17. Therefore, both of you are of age to date. After he turns 21, he can legally drink, but other than that everything should remain the same.